AJ Tech shaft
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I believe the AJ60 shaft has been discontinued but has been rebadged and sold under the Ztour55 label. Exact same shaft - but different writing is all. Nominal weight (depending on flex) is 57-61g and torque is 2.7-3.3. Mid launch / mid spin. Probably difficult to source these days - if you can find one then great, if not then it's probably time to move on and get fitted.